init, starts simulation incorrectly

Makefile

@@ -0,0 +1,30 @@
+VIVADO_SETTINGS := C:/Xilinx/Vivado/2023.1/settings64.sh
+
+PROJ_NAME		:= example
+SIM_TOP			:= example_tb
+
+SRC_DIR			:= src
+SIM_DIR			:= sim
+BUILD_DIR		:= .build
+
+WAVEFORM_CFG := $(SIM_DIR)/$(SIM_TOP).sim.wcfg
+
+WAVEFORM_VCD := simulation_${PROJ_NAME}.wdb
+
+sim: $(WAVEFORM_VCD)
+
+$(WAVEFORM_VCD): $(SRC_DIR)/*.vhdl
+	cd $(BUILD_DIR) && \
+	xelab -debug typical $(SIM_TOP) -s $(SIM_TOP).sim && \
+	xsim $(SIM_TOP).sim -gui -view ../$(WAVEFORM_CFG)
+
+$(SRC_DIR)/*.vhdl: $(BUILD_DIR)
+	cd $(BUILD_DIR) && \
+	xvhdl ../$(SRC_DIR)/*.vhdl ../$(SIM_DIR)/*.vhdl
+
+$(BUILD_DIR):
+	source $(VIVADO_SETTINGS) && \
+	mkdir -p $@
+
+clean:
+	rm -rf $(BUILD_DIR) *.log *.pb